ATLANTA -- An Atlanta Public Schools report says a middle school principal had an affair with a teacher and allowed a custodian to stay on the job despite rumors that he was selling drugs to students.

The APS investigation into Dr. Kelvin Griffin, the principal of Young Middle School, concluded that he carried on "inappropriate relationships" with a teacher and with a married parent.

For example, the investigators interviewed an assistant principal who said that one night after school he knocked on the teacher's office door because he heard voices. No one answered. Later he said he saw live video from the school security camera of the teacher and Griffin sneaking out of her office. He says he saved the recording as insurance in case he needed it to protect himself.

The teacher denied to investigators that she had an affair with Griffin. But the parent said she had an affair with Griffin. Griffin, who is married, denied he had any affairs.

The report says Griffin failed to investigate rumors that a school custodian was selling drugs to students; the report says Griffin allowed the principal to stay on the job, instead.

Griffin told investigators, "I should have looked into the matter more."

The report also states that Griffin gave permission for a non-certified teacher to administer a state survey to students, the Teacher Keys Effectiveness System (TKES) survey, in violation of state policy. Griffin admitted he did, according to the report.

Griffin is reportedly no longer employed by APS. 11Alive News was unable to reach him, or anyone with APS, Thursday night to comment on the report, and what's next.